Arihant-class SSBN - News & Discussions

So as It turns out this is most likely a S4 submarine model and not a S5 model like people had suspected for so long leaving the hump backed one is the only publically know design of S5
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Arihant's hump (same general bulkheads will be used on S4/4* as well) is streamlined, but not this streamlined. There will be a very visible taper once the missile compartment ends and the power/propulsion compartment begins:

INS_Arihant_at_sea_(cropped).jpg

...followed by a further taper as you go toward the stern. Two distinct taper points. Here I've marked them for a side-on reference although the photo above shows it much better:

tapers.jpg

HI Sutton's cutaway is a useful reference to show what I mean i.e. the reactor compartment will be a distinct module that sits behind the missile compartment:

Indian-Navy-Arihant-Class-Submarine-Cutaway-scaled.jpg

What happens in the S4/4* is that we added a further 4-tube 'plug' behind the current missile compartment, so the reactor compartment (and the machinery rooms behind it) should just get pushed further away, not that the missile compartment starts eating into the space of the reactor. So that first taper should still be there, just further away from the tower is all.

But in the hydrodynamic model, the first taper is totally non-existent. That would only be possible if the bulkhead that contains the reactor/propulsion compartment is the same dimensions as the missile compartment. I don't see a reason why they would go and do that for the S4/S4*, when it's clearly not the case for the S2/S3. Unless they're implementing something new like a NEP, which might necessitate enlarging that bulkhead over the proven config from the first two boats.

Satellite images can be quite deceptive, so best not to rely on them alone for this sort of analysis. Here you can see the S4 beside one of the shorter Arihants, the sat image makes it seem like even the shorter Arihant only has one taper, when we clearly know that's not the case:

FRrfW40aMAEsivB.jpg
 
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Regarding the nuclear reactors of some of the world current & next SSBNs :

  • US : current Ohio class 220 MW --> next Columbia class, found info like 220 or +300 MW
  • UK : Vanguard class 145MW --> next Dreadnought, 210 MW
  • French : current Triomphant class, 150 MW --> Invicible class, should be K22 reactor (220 or 225 MW) developed for the next French aircraft carrier
    • Regarding the Indian S5, it should be 200 MW ... But BARC has developed the BSMR (smalll module reactor) of 220MW... Could it be possible that the real power of S5 nuclear reactor is about 220 MW ?
 
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Battries for INS Arihant from Exide
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Port & Starboard Turbine for INS Arihant, INS Arighat, S4 & S4* by Triveni Turbine Ltd
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There are a lot more nuggets of information here
Indian Naval & Marine Industry - A Capability Catalogue

 
S4 and Type 094 compares in tech except 12 vs 8 VLS . But noise level should be similar.

Type 096 is expected to features everything new gen, so is S5.
China is jumping the boat from the hump deisgn to streamline ones like the western subs , Most of the S5 designs are like Hump based or kinda looks like the british subs..
 
China is jumping the boat from the hump deisgn to streamline ones like the western subs , Most of the S5 designs are like Hump based or kinda looks like the british subs..
Nope, those designs were old version. S5 will have very little, streamlined hump to none.

S5 will be atleast as stealthy(acoustic) as current western SSBN(from what i have read).
 
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How do indian SSBNs like the newest S4 and future S5 class subs compare to Chinese Type 094 or the new Type 096 , perhaps a comparison to the french ones would be good..
Indian SSBN are much quieter than Chinese Nuclear subs by a whole generation & the upcoming S-5 will be on par with their western counterparts.
 
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How? Chinese have been building nuclear subs since the 70s tho it was an attack sub but the reactor tech is mostly the same ig.
So what if China started building submarines before India ? Does that automatically make China ahead of India ? According to whom, You 🤨 ?.... There is plenty of open source data on the acoustic noise (dB) levels of Chinese submarines, including their latest generation boats. The Akula class submarine leased to India by Russia was more than 3 decades ahead of China's best nuclear submarines in terms of acoustic stealth. All Arihant class submarines built after the ATV prototype have achieved Akula level quieting, if not better. Simply building submarines earlier does not automatically translate into superior submarine technology or overall capability.
 
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So what if China started building submarines before India ? Does that automatically make China ahead of India ? According to whom, You 🤨 ?.... There is plenty of open source data on the acoustic noise (dB) levels of Chinese submarines, including their latest generation boats. The Akula class submarine leased to India by Russia was more than 3 decades ahead of China's best nuclear submarines in terms of acoustic stealth. All Arihant class submarines built after the ATV prototype have achieved Akula level quieting, if not better. Simply building submarines earlier does not automatically translate into superior submarine technology or overall capability.
? no? the S5 class SSBN is on par with the new class SSBN by China the same way the S4 is on par with the current gen. Your being delusional/ are ragebaiting.
 
So what if China started building submarines before India ? Does that automatically make China ahead of India ? According to whom, You 🤨 ?.... There is plenty of open source data on the acoustic noise (dB) levels of Chinese submarines, including their latest generation boats. The Akula class submarine leased to India by Russia was more than 3 decades ahead of China's best nuclear submarines in terms of acoustic stealth. All Arihant class submarines built after the ATV prototype have achieved Akula level quieting, if not better. Simply building submarines earlier does not automatically translate into superior submarine technology or overall capability.
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Not sure if this is S5